Phase Transitions in Neutron Stars Within
Modified Quark-Meson Coupling Model |
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Authors: | MA Chang-Qun and GAO Chun-Yuan |
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Institution: | School of Physics and State Key Laboratory of Nuclear Physics
and Technology, Peking University, Beijing 100871, China |
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Abstract: | K- condensation and quark deconfinement phase transitions in neutron stars are investigated. We use the modified quark-meson coupling model for hadronic phase and the MIT
bag model for quark phase. With the equation of state (EOS) solved
self-consistently, we discuss the properties of neutron stars. We
find that the EOS of pure hadron matter with condensed K- phase
should be ruled out by the redshift for star EXO0748-676, while EOS
containing unpaired quark matter phase with B1/4 being about
180 MeV could be consistent with both this observation and the best
measured mass of star PSR 1913+16. But if the recent inferred massive star among Terzan 5 with
M>1.68M๏ is confirmed,
all the present EOSes with condensed phase and deconfined phase
would be ruled out. |
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Keywords: | neutron star modified quark-meson coupling model nuclear matter quark matter |
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